May 12, 2008
The following parameter is needed when configuring IPv6: IPV6INIT=yes Address. You can add an IPv6 address with: IPV6ADDR=[/] For example: IPV6ADDR=fe80::2/64 The prefix is optional. Gateway. You can add the IPv6 gateway with: IPV6_DEFAULTGW= For example: IPV6_DEFAULTGW=fe80::1/64 Preferring IPv4 over IPV6 addresses. Modifying the precedences in the gai.conf, every time a program calls getaddrinfo() for resolving host names, Linux will prefer the IPv4 addreses. This is very useful when you try to contact a server with both IPv4 and IPv6 addresses from a machine behind a NAT or a router. Hi! I wanted to install FreeIPA on my local network. Unfortunately it does require working IPv6 (for SAMBA). I must have disabled IPv6 in the past somewhere and now I have hard time enabling it again. While other fedora workstations are getting ipv6 properly assigned, my fedora server is not cooperative. I am using bridge between vnet and eth: DEVICE=br0 TYPE=Bridge IPADDR=10.0.2.11 NETMASK I remember that some distribution installers asked in the past if IPv6 should be enabled or not. Perhaps the Fedora installer did (or does) it as well. How do I easily check a Fedora system (>= 17) if IPv6 was enabled/disabled during the installation? Or how do I check if the Fedora system is ready for IPv6 enabled routers? Fedora Labs is a selection of curated bundles of purpose-driven software and content as curated and maintained by members of the Fedora Community. These may be installed as standalone full versions of Fedora or as add-ons to existing Fedora installations.
Jan 24, 2013
Oct 23, 2019 · Disable IPv6 On CentOS 7 / RHEL 7. It can be disabled either by using sysctl.conf or by placing .conf in the /etc/sysctl.d directory. CentOS 7 now supports disabling IPv6 for all or a particular network adapter. We do not recommend that you disable IPv6 or its components. If you do, some Windows components may not function. We recommend that you use “Prefer IPv4 over IPv6” in prefix policies instead of disabling IPV6. Fedora contains complete support for both IPv4 and IPv6. By default, Fedora configures network interfaces on your computer for both IPv4 and IPv6 support, and to use DHCP over both IPv4 and IPv6. However, the speed of some services improves drastically if you disable IPv6 on any interface on a network that does not use IPv6.
Disabling IPV6 : Fedora
Apr 19, 2009 · This is a shame, since if there are any accidental/erroneous ipv6 router-advertisements on the network, fedora* will latch onto it like a rottweiler on a shank bone, and not let go. Since ipv6 is preferred by default in several bits of the OS, a bad ipv6 address trumps a good ipv4 one and damages connectivity. 1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp1s0: mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether That lead me to wondering if it was something strange going on with ipv6 on my machine, so I wanted to "turn it off" as a test. Adding that line to the file did "turn it off", and DNS was fine. Currently, it looks like 68.54.80.5 or your network's NAT is misbehaving somehow. Jan 24, 2013 · IPV6 is coming, but it is not here yet, so say you want to disable it on your Fedora 18 system. Pretty simple to do. First let’s edit the /etc/sysctl.conf file. 1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens2: mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 52 The following parameter is needed when configuring IPv6: IPV6INIT=yes Address. You can add an IPv6 address with: IPV6ADDR=[/] For example: IPV6ADDR=fe80::2/64 The prefix is optional. Gateway. You can add the IPv6 gateway with: IPV6_DEFAULTGW= For example: IPV6_DEFAULTGW=fe80::1/64 Preferring IPv4 over IPV6 addresses. Modifying the precedences in the gai.conf, every time a program calls getaddrinfo() for resolving host names, Linux will prefer the IPv4 addreses. This is very useful when you try to contact a server with both IPv4 and IPv6 addresses from a machine behind a NAT or a router.